package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

/**
 * TODO
 *
 * @Author mr.zhao
 * @Date 2025/5/25 22:58
 */
@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
	@Autowired
	private ShoppingCartMapper shoppingCartMapper;

	@Autowired
	private DishMapper dishMapper;

	@Autowired
	private SetmealMapper setmealMapper;

	/**
	 * 查看购物车
	 *
	 * @return
	 */
	@Override
	public List<ShoppingCart> list() {
		List<ShoppingCart> list = shoppingCartMapper.list(ShoppingCart.builder().userId(BaseContext.getCurrentId()).build());

		return list;
	}

	/**
	 * 添加购物车
	 *
	 * @param shoppingCartDTO
	 */
	@Override
	public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
		ShoppingCart shoppingCart = new ShoppingCart();
		BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
		//只能查自己的购物车
		shoppingCart.setUserId(BaseContext.getCurrentId());

		//判断当前商品是否在购物车中
		List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
		if (shoppingCartList != null && shoppingCartList.size() == 1){
			//如果存在,就数量加
			shoppingCart = shoppingCartList.get(0);
			shoppingCart.setNumber(shoppingCart.getNumber() + 1);
			shoppingCartMapper.updateNumberById(shoppingCart);
		}else {
			//不存在,插入数据,数量为1
			//判断当前加入购物车的是菜品还是套餐
			Long dishId = shoppingCartDTO.getDishId();
			if (dishId != null){
				//添加到购物车的是菜品
				Dish dish = dishMapper.getById(dishId);
				shoppingCart.setName(dish.getName());
				shoppingCart.setImage(dish.getImage());
				shoppingCart.setAmount(dish.getPrice());
			}else {
				//添加到购物车的是套餐
				Long setmealId = shoppingCartDTO.getSetmealId();
				Setmeal setmeal = setmealMapper.getById(setmealId);
				shoppingCart.setName(setmeal.getName());
				shoppingCart.setImage(setmeal.getImage());
				shoppingCart.setAmount(setmeal.getPrice());
			}
			shoppingCart.setNumber(1);
			shoppingCart.setCreateTime(LocalDateTime.now());
			shoppingCartMapper.insert(shoppingCart);
		}
	}

	/**
	 * 清空购物车
	 */
	@Override
	public void cleanShoppingCart() {
		shoppingCartMapper.deleteByUseId(BaseContext.getCurrentId());
	}
}
